Chimney-cap.



No. 740,247. PATENTED SEPT. 29, 1903. r

G. R. GROSS.

CHIMNEY GAP."

, LPPLIOATION FILED MAY 27, 1903.

N0 MODEL.

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U P. TATE$ 1 Fatented Qeptember IQO.

PATENT O'FFICE.

CHIMNEY-CAP.

SEEGIFICATION forming part of Letters Patent No. 740,247, dated September 29, 1903. Application filed May 27, 1903- Serial lilo. 153,955. (No model.)

f To all whom it inwy concern:

' chimneys of the character specified.

The invention consists'in the novel construction and combination of parts, as is hereinafter described, and defined in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure'l is a perspective view of the improved chimney-cap in position upon the top of a chimney. Fig. 2 is a transverse sectional viewof the cap and chimney, substantially on the line 2 2 in Fig. 1. Fig. 3 is a partly sectional reversed plan view of the chimneycap. Fig. 4 is a perspective view of amodified form of the improvement, and Fig. 5 is a partly-sectional reversed plan view of the modified form of the chimney-cap shown in Fig. l.

The improvement is intended for application upon chimneys of any dimensions or area in plan of the upper end surface and is particularly well adapted for the completing bonnet or cap on draft-fines or chimneys in buildings, and it may be of rectangular or of some other polygonal form.

In the drawings that represent the construc tion'and application of the improved cap, A represents the top portion of a brick chimney having a straight vertical flue a therein, said chimney top and line having rectangular contours that are parallel between respective sides of the same. The chimney-cap when formed tosurmount achimney A having the central vertical fine a therein-that is, to continue'through the cap--is constructed, essentially, as shown in Figs. 1, 2, and 3, comprising the following details:

In a suitable matrix (not shown) the con-- trally-apertured cap-block 10 is formed of cement in plastic condition, the cement material being thus shaped to give it rectangular peripheral form and produce the aperture 0. therein at the center having a corresponding contour. The sides of the rectangular aperture a are disposed parallel with respectively opposite exterior sides of the cap-block, and, as shown in Figs. 1 and 2, the upper surface of the cap-block is sloped downward and outward from each edge of the aperture 01, to a corresponding outer edge of the cap-block, thus adapting it to shed rain or snow. In the lower side of the cap-block 10 a flat-bottomed rectangular recess 7) is formed, having proper area to adapt the cap-block to seat upon the level upper surface of the chimney A. The formation of the recess 1) affords two rectangular depending flanges o c, respectively, at the inner and outer edges of the recess h, these flanges embracing the inner and outer edges of the upper end of the chimney, as is clearly shown in Fig. 2. To give strength and endurance to the cement body of the cap-block 10, it is reinforced by the embedment therein of a tessellated frame, preferably formed of strips of metal, that is rendered ndn-oxidating by galvanizing'it or coating the same with a suitable paint. As

shown, the plurality of metal strips 11 are formed into any preferred number of rectangular rings that are graded in size and so proportioned in relative diameter that when placed one within the other in regular order a suitable space will be provided between them. The several frame rings are held spaced apart by the spacing bars or strips 11, which unite the rings and hold them separated to produce a skeleton or tessellated frame.

It will be seen that the embedment of the reinforcing-frame within the plastic material of the cap-block 10 while it is receiving form will'renderit quite strong and adapt the capblock to sustain considerable breaking strain without permanent injury, as the block if cracked by rough usage will not fall into pieces, being held by the metal frame from fragmentary separation, so that the crevices may be filled and the block be rendered solid into the cracks which when set will reunite all parts of the cap-block.

In the construction of chimneys for certain situations it is found that to enable the chimney to have proper draft it is advantageous to provide a non-perforate cap-block therefor, which will seal the top of the chimney. In this construction of the cap-block, that is shown at 10 in Figs. 4 and 5, there are one or more lateral openings A formed in the chimney A at or near its upper end. If the lateral openings A arein the form of recesses in the upper surface of the chimney and the lower surface of the cap-block 10 forms the upper surface of such opposite openings, there will remain two piers A that form the side walls of the openings. In this case there may be two depending rectangular borderflanges e 6, formed on the lower side of the cap-block 10, which are designed to respec-v tively embrace the upper edges of the chimney-piers A and thus bind the cap-block on the upper end of the chimney. When the cap-block is formed without a central opening, in it, the tessellated frame that is composed of a series of rings that are held spaced apart, as before explained, may extend across the central portion of the cap-block, and thus bind all portions of the same together, as is indicated by dotted lines in Fig. 5.

In mounting the cap-block 10 or 1O upon a chimney there is a thin coating of cement mortar first applied upon the upper flat surface of the chimney, which will have intimate contact with the lower surface of the cap-block when itis seated thereon, and will practically unite the cap-block with the chimney.

When in position, the cap-block adds a neatfinish to the chimney, renders its top very durable, and obviously protects adjacent portions of the chimney-wall, and in case the chimney is painted to finish it in harmony with the buildingit surmounts the cap-block may also be similarly painted with a waterproof paint of proper color.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A chimney-cap, comprising a rectangular cement body having a central aperture, and depending flanges respectively projecting from the wall of the aperture, and the exterior wall of the cap, and an interior reinforcing-frame formed of metal strips bent into rectangular ring form, and held spaced apart by strips of metal joined by theirends upon respective rings.

2. Achimney-capcomprisingarectangular cement body having a central aperture, de-

pending concentric flanges thereon, and an interior tessellated reinforcing-frame surrounding the aperture.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE RUEL CROSS.

Witnesses:

JEREPHY J. OCoNNnLL, R. J. (JURRAN. 

